Carbon/sponge filtration mediums?
Anyone? I'm referring to the Hagen combination filter cartridge, fits all
undergravel filters. Contains activated carbon and filter foam. Art
#A-855. 2 per pack. TIA.
"Tasslehoff" wrote in message
u...
Do Carbon/sponge filter mediums for UGF's absorb minerals like
iron/potassium and other fertiliser products from the water column?
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